to do things that normal happy families do, especially when you want it to appear that your family is happy :
I'm not going to play happy families just for the benefit of your parents.
to do things that normal happy families do, especially when you want it to appear that your family is happy :
I'm not going to play happy families just for the benefit of your parents.
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005